Module kala.compress.compressors.pack200

Package kala.compress.harmony.unpack200.bytecode.forms

Class WideForm

java.lang.Object

kala.compress.harmony.unpack200.bytecode.forms.ByteCodeForm

kala.compress.harmony.unpack200.bytecode.forms.VariableInstructionForm

kala.compress.harmony.unpack200.bytecode.forms.WideForm

public class WideForm
extends VariableInstructionForm

This class implements the byte code form for the wide instruction. Unlike other instructions, it can take multiple forms, depending on what is being widened.

Field Summary

Fields inherited from class kala.compress.harmony.unpack200.bytecode.forms.ByteCodeForm

byteCodeArray, byteCodesByName, WIDENED

Constructor Summary

Constructors

Constructor	Description
WideForm(int opcode, java.lang.String name)

Method Summary

Modifier and Type	Method	Description
void	setByteCodeOperands(ByteCode byteCode, OperandManager operandManager, int codeLength)	When passed a byteCode, an OperandTable and a SegmentConstantPool, this method will set the rewrite of the byteCode appropriately.
protected void	setByteCodeOperandsFormat1(int instruction, ByteCode byteCode, OperandManager operandManager, int codeLength)	This method sets the rewrite array for the bytecode using Format 1 of the JVM spec: an opcode and two index bytes.
protected void	setByteCodeOperandsFormat2(int instruction, ByteCode byteCode, OperandManager operandManager, int codeLength)	This method sets the rewrite array for the bytecode using Format 2 of the JVM spec: an opcode, two index bytes, and two constant bytes.

Methods inherited from class kala.compress.harmony.unpack200.bytecode.forms.VariableInstructionForm

setRewrite2Bytes, setRewrite4Bytes, setRewrite4Bytes

Methods inherited from class kala.compress.harmony.unpack200.bytecode.forms.ByteCodeForm

calculateOperandPosition, firstOperandIndex, fixUpByteCodeTargets, get, getName, getOpcode, getRewrite, getRewriteCopy, hasMultipleByteCodes, hasNoOperand, nestedMustStartClassPool, operandLength, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

WideForm

public WideForm(int opcode,
                java.lang.String name)

Method Detail

setByteCodeOperands

public void setByteCodeOperands(ByteCode byteCode,
                                OperandManager operandManager,
                                int codeLength)

Description copied from class: ByteCodeForm

When passed a byteCode, an OperandTable and a SegmentConstantPool, this method will set the rewrite of the byteCode appropriately.

Specified by:

setByteCodeOperands in class ByteCodeForm

Parameters:

byteCode - ByteCode to be updated (!)

operandManager - OperandTable from which to draw info

codeLength - Length of bytes (excluding this bytecode) from the beginning of the method. Used in calculating padding for some variable-length bytecodes (such as lookupswitch, tableswitch).

setByteCodeOperandsFormat1

protected void setByteCodeOperandsFormat1(int instruction,
                                          ByteCode byteCode,
                                          OperandManager operandManager,
                                          int codeLength)

This method sets the rewrite array for the bytecode using Format 1 of the JVM spec: an opcode and two index bytes. This is used for ?load/?store/ret

Parameters:

instruction - should be 132

byteCode - the byte code whose rewrite array should be updated

operandManager - the source of the operands

codeLength - ignored

setByteCodeOperandsFormat2

protected void setByteCodeOperandsFormat2(int instruction,
                                          ByteCode byteCode,
                                          OperandManager operandManager,
                                          int codeLength)

This method sets the rewrite array for the bytecode using Format 2 of the JVM spec: an opcode, two index bytes, and two constant bytes. This is used for iinc.

Parameters:

instruction - int should be 132

byteCode - ByteCode whose rewrite array should be updated

operandManager - OperandManager source of the operands

codeLength - ignored